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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: RE: That isn't a mac diagram posted there posted by Michael Samra on May 7, 2016 at 15:27:23:
You must include both the cathode and anode in your gain determination because that's how a tube operates. If you examine the Dyna circuit carefully you'll find that the cathode is involved here too. The big difference is that in the Dyna output stage the cathodes of the finals are effectively at ground potential. Thus voltage measurements of g1 input and anode output referenced to ground are the same as if referenced to the cathode. You can't reference directly to ground in the Mac circuit because the cathodes of the finals are not at AC ground potential.
As Doug has mentioned a couple of times, the 12BH7 bootstrapped stage is a means to an end and is really pretty irrelevant to the discussion of the gain of the unity coupled output stage.
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Follow Ups
- RE: That isn't a mac diagram posted there - Steve O 18:54:47 05/07/16 (2)
- RE: That isn't a mac diagram posted there - Michael Samra 19:43:19 05/07/16 (1)
- measurements - PakProtector 04:44:04 05/13/16 (0)
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